下面这段JS看不懂，谁能帮忙看下

[虫二二]

var Tween = {
 Quart: {
  easeOut: function(t,b,c,d){
   return -c * ((t=t/d-1)*t*t*t - 1) + b;
  }
 },
 Back: {
  easeOut: function(t,b,c,d,s){
   if (s == undefined) s = 1.70158;
   return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
  }
 },
 Bounce: {
  easeOut: function(t,b,c,d){
   if ((t/=d) < (1/2.75)) {
    return c*(7.5625*t*t) + b;
   } else if (t < (2/2.75)) {
    return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
   } else if (t < (2.5/2.75)) {
    return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
   } else {
    return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
   }
  }
 }
}

这段CODE看得头晕死了，汗，就是不明白什么意思

[虫二二]

<SCRIPT type=text/javascript> 
var $ = function (id) {
 return "string" == typeof id ? document.getElementById(id) : id;
};
var Extend = function(destination, source) {
 for (var property in source) {
  destination[property] = source[property];
 }
 return destination;
}
var CurrentStyle = function(element){
 return element.currentStyle || document.defaultView.getComputedStyle(element, null);
}
var Bind = function(object, fun) {
 var args = Array.prototype.slice.call(arguments).slice(2);
 return function() {
  return fun.apply(object, args.concat(Array.prototype.slice.call(arguments)));
 }
}
var Tween = {
 Quart: {
  easeOut: function(t,b,c,d){
   return -c * ((t=t/d-1)*t*t*t - 1) + b;
  }
 },
 Back: {
  easeOut: function(t,b,c,d,s){
   if (s == undefined) s = 1.70158;
   return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
  }
 },
 Bounce: {
  easeOut: function(t,b,c,d){
   if ((t/=d) < (1/2.75)) {
    return c*(7.5625*t*t) + b;
   } else if (t < (2/2.75)) {
    return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
   } else if (t < (2.5/2.75)) {
    return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
   } else {
    return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
   }
  }
 }
}
//容器对象,滑动对象,切换数量
var SlideTrans = function(container, slider, count, options) {
 this._slider = $(slider);
 this._container = $(container);//容器对象
 this._timer = null;//定时器
 this._count = Math.abs(count);//切换数量
 this._target = 0;//目标值
 this._t = this._b = this._c = 0;//tween参数
 
 this.Index = 0;//当前索引
 
 this.SetOptions(options);
 
 this.Auto = !!this.options.Auto;
 this.Duration = Math.abs(this.options.Duration);
 this.Time = Math.abs(this.options.Time);
 this.Pause = Math.abs(this.options.Pause);
 this.Tween = this.options.Tween;
 this.onStart = this.options.onStart;
 this.onFinish = this.options.onFinish;
 
 var bVertical = !!this.options.Vertical;
 this._css = bVertical ? "top" : "left";//方向
 
 //样式设置
 var p = CurrentStyle(this._container).position;
 p == "relative" || p == "absolute" || (this._container.style.position = "relative");
 this._container.style.overflow = "hidden";
 this._slider.style.position = "absolute";
 
 this.Change = this.options.Change ? this.options.Change :
  this._slider[bVertical ? "offsetHeight" : "offsetWidth"] / this._count;
};
SlideTrans.prototype = {
  //设置默认属性
  SetOptions: function(options) {
 this.options = {//默认值
  Vertical: true,//是否垂直方向（方向不能改）
  Auto:  true,//是否自动
  Change:  0,//改变量
  Duration: 50,//滑动持续时间
  Time:  10,//滑动延时
  Pause:  4000,//停顿时间(Auto为true时有效)
  onStart: function(){},//开始转换时执行
  onFinish: function(){},//完成转换时执行
  Tween:  Tween.Quart.easeOut//tween算子
 };
 Extend(this.options, options || {});
  },
  //开始切换
  Run: function(index) {
 //修正index
 index == undefined && (index = this.Index);
 index < 0 && (index = this._count - 1) || index >= this._count && (index = 0);
 //设置参数
 this._target = -Math.abs(this.Change) * (this.Index = index);
 this._t = 0;
 this._b = parseInt(CurrentStyle(this._slider)[this.options.Vertical ? "top" : "left"]);
 this._c = this._target - this._b;
 
 this.onStart();
 this.Move();
  },
  //移动
  Move: function() {
 clearTimeout(this._timer);
 //未到达目标继续移动否则进行下一次滑动
 if (this._c && this._t < this.Duration) {
  this.MoveTo(Math.round(this.Tween(this._t++, this._b, this._c, this.Duration)));
  this._timer = setTimeout(Bind(this, this.Move), this.Time);
 }else{
  this.MoveTo(this._target);
  this.Auto && (this._timer = setTimeout(Bind(this, this.Next), this.Pause));
 }
  },
  //移动到
  MoveTo: function(i) {
 this._slider.style[this._css] = i + "px";
  },
  //下一个
  Next: function() {
 this.Run(++this.Index);
  },
  //上一个
  Previous: function() {
 this.Run(--this.Index);
  },
  //停止
  Stop: function() {
 clearTimeout(this._timer); this.MoveTo(this._target);
  }
};
</SCRIPT>
<BODY>
告诉你一个应有尽有的网页特效网址：<a href="http://js.alixixi.com">http://js.alixixi.com</a>
<hr />
<DIV id=idContainer2 class=container>
<TABLE id=idSlider2 border=0 cellSpacing=0 cellPadding=0>
  <TBODY>
<TR>
<TD class=td_f><A onclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.SOFTMGR'});" href="http://js.alixixi.com"><IMG src="http://pc.qq.com/pc/images/manage.jpg"></A></TD>
<TD class=td_f><A onclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.PY'});" href="http://js.alixixi.com"><IMG src="http://pc.qq.com/pc/images/py.jpg"></A></TD>
<TD class=td_f><A onclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.PLAYER'});" href="http://js.alixixi.com"><IMG src="http://pc.qq.com/pc/images/player.jpg"></A></TD>
<TD class=td_f><A onclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.XF'});"  href="http://js.alixixi.com"><IMG src="http://pc.qq.com/pc/images/xf.jpg"></A></TD>
<TD class=td_f><A onclick="pgvSendClick({hottag:'ISD.SHOW.BANNER.TT'});"  href="http://js.alixixi.com"><IMG  src="http://pc.qq.com/pc/images/TT.jpg"></A></TD>
</TR>
  </TBODY>
</TABLE>
<UL id=idNum class=num></UL>
</DIV>
<SCRIPT> 
//new SlideTrans("idContainer", "idSlider", 3).Run();
///////////////////////////////////////////////////////////
var forEach = function(array, callback, thisObject){
 if(array.forEach){
  array.forEach(callback, thisObject);
 }else{
  for (var i = 0, len = array.length; i < len; i++) { callback.call(thisObject, array[i], i, array); }
 }
}
var st = new SlideTrans("idContainer2", "idSlider2", 5, { Vertical: false });
var nums = [];
//插入数字
for(var i = 0, n = st._count - 1; i <= n;){
 (nums[i] = $("idNum").appendChild(document.createElement("li"))).innerHTML = ++i;
}
forEach(nums, function(o, i){
 o.onmouseover = function(){ o.className = "on"; st.Auto = false; st.Run(i); }
 o.onmouseout = function(){ o.className = ""; st.Auto = true; st.Run(); }
})
//设置按钮样式
st.onStart = function(){
 forEach(nums, function(o, i){ o.className = st.Index == i ? "on" : ""; })
}
//$("idAuto").onclick = function(){
 //if(st.Auto){
  //st.Auto = false; st.Stop(); this.value = "自动";
 //}else{
  //st.Auto = true; st.Run(); this.value = "停止";
 //}
//}
//$("idNext").onclick = function(){ st.Next(); }
//$("idPre").onclick = function(){ st.Previous(); }
//$("idTween").onchange = function(){
 //switch (parseInt(this.value)){
  //case 2 :
   //st.Tween = Tween.Bounce.easeOut; break;
  //case 1 :
   //st.Tween = Tween.Back.easeOut; break;
  //default :
   //st.Tween = Tween.Quart.easeOut;
 //}
//}
st.Run();
</SCRIPT>

完整代码就是这样

[虫二二]

没有高手吗/？

[hotup]

不想看...累人

[dh20156]

缓动算法

[anjing5566]

不是没有高手，只是代码太多，字太小。还有你能不能大方点，分要给足。

这个是缓动的算法，就是图片在页面上按照指定的算法返回的xy值"滑动"

[KK3K2005]

具体不明白在那个 位置呢

[Inpool]

对象的json表示，写成下面这样应该好理解点：

var Tween = new Object();

Tween.Quart = new Object();
Tween.Quart.easeOut = function(t,b,c,d){
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
}

Tween.Back = new Object();
Tween.Back.easeOut = function(t,b,c,d,s){
	if (s == undefined){
		s = 1.70158;
	}
	return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
}

Tween.Bounce = new Object();
Tween.Bounce = function(t,b,c,d){
	if ((t/=d) < (1/2.75)) {
		return c*(7.5625*t*t) + b;
	} else if (t < (2/2.75)) {
		return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
	} else if (t < (2.5/2.75)) {
		return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
	} else {
		return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
	}
}

[wushengtuzi]

高手云集的地方，我这个老头简直看的眼花缭乱，什么时候能达到你们的程度啊？咳！

[englandfr]

顶，学习下

[passself]

这是json来表示的方法，和7楼分解的是一样的，就是三个函数，楼主这有什么不理解的那